Main

Once you have reached the required XP Level as long as you have enough space, staff, and Energy, these are your Main Income and XP producing structures. You can Upgrade these structures 5 Levels giving you more Profit and faster XP and the value of each structure is added to your Luxury score.
Build Main structures for your tourists to come and shop at and stay in, but after collecting profit from so many visitors, your structures will break down from time-to-time and need repairing.